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West Midlands Police said the officer driving the Peugeot was on routine patrol and not responding to an emergency call at the time of the crash.

The emergency response officer, who is based in Sutton Coldfield, provided first aid at the scene while awaiting the arrival of paramedics.

West Midlands Police Chief Inspector Neil Hobson said: "No parent should have to lose a child, particularly in such tragic circumstances. This evening our thoughts are with Harry's family following their tragic loss.

"As Harry was hit by a police car, West Midlands Police has informed the Independent Police Complaints Commission, who continue to be updated."

The officer is said to be "traumatised" by the ordeal, but is assisting the investigation and has been questioned by members of his force's professional standards department.

CCTV cameras, which may have captured the moment Harry was struck by the Peugeot, have been identified.

The footage is being reviewed by investigators.

• Anyone who was in the area at the time and has not yet spoken to police is urged to call investigating officers on 101